How do you read the meniscus?
To be sure you are able to read consistently and accurately, always read the meniscus at eye level. When the eyes are above the level of the meniscus, the value read is less than the level reading. When the eyes are below the level of the meniscus, the value read is more than the level reading.
Why do I have a meniscus?
The meniscus occurs because water is attracted to the glass/plastic. All equipment that is intended to measure volume will take into account the meniscus, as long as you take your reading with the meniscus at eye level. The measurement must be done at eye level in order to ensure no parallax error.
What determines the shape of a meniscus curve?
The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container. A concave meniscus occurs when the molecules of liquid are strongly attracted to the container wall rather than to each other.
What is the meniscus in a beaker?
meniscus is when you fill the beaker upwith liquid. when yo go down to look at the beaker with eye level, you see a dip. that's the meniscus. -used in science When reading the volume of fluid in a graduated cylinder the eye should be? Level with the bottom of the fluid's meniscus
How to read a meniscus?
The long answer: To read a meniscus, you first need to see what type of meniscus your liquid forms. If the meniscus is a concave meniscus, read at the lowest level of the curve. If the meniscus is convex, take your measurement at the highest point of the curve. The short answer: Take your measurement from the center of the meniscus.
How are concave menisci formed?
Concave menisci are read from the bottom of the cur ve at eye level. A meniscus is a curve formed on the upper surface of a liquid inside a container. This curve is formed by the surface tension between the liquid and the container holding the liquid. If the molecules in the liquid are more attracted to the sides of the container than to each other, ...
What happens when a liquid is concave?
If the molecules in the liquid are more attracted to the sides of the container than to each other, the liquid will stick to the sides of the container. When this happens, the meniscus curve bends down and is called concave. Most liquids form this kind of meniscus. Water is a common example of a liquid that forms a concave meniscus.
Where are convex menisci read?
Convex menisci are read from the top of the curve at eye level.
Is water a concave meniscus?
Water is a common example of a liquid that forms a concave meniscus. In some cases, the molecules of a liquid are more attracted to each other than the sides of the container, the liquid will pull away from the side of the container and form an upward curve, or convex meniscus. This type of meniscus is occasionally known as a ‘backward meniscus’, ...
Where to take meniscus measurement?
The short answer: Take your measurement from the center of the meniscus.
Where does the word "meniscus" come from?
Meniscus is from the Greek word mēniskos meaning “crescent moon”.
What is a concave meniscus?
A concave meniscus occurs when the molecules of liquid are strongly attracted to the container wall rather than to each other. In that case, liquid appears to ‘stick’ from the edges forming a concave shape.
What is the meniscus of a liquid?
What is Meniscus? The meniscus of a liquid is the upward or downward curve seen at the top of a liquid in a container. The nature of curve whether upward (convex) or downward (concave) depends on the surface tension the liquid and its adhesion capacity to the wall of the container.
Why are liquids so difficult to measure?
Liquids are difficult to measure with the naked eye due to surface tensions causing a meniscus to form on the circumference of the measuring object.
How to get accurate reading of meniscus?
You must get at eye-level with the meniscus to obtain an accurate reading. Pick up the glassware to bring it up to eye level or bend down to take a measurement.
Is water a convex or concave meniscus?
Most liquids, including water, show a concave meniscus but a great example of a convex meniscus is liquid mercury in a glass container. It is to be noted that in some cases, the meniscus appears in a straight line instead of any curvature at all. For example, water in some plastic cylinders. No meniscus makes measuring very easy.